SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1bf440936826d88f036899b875ea81194fe74162c8d50ca2c12c259552fe9857' 
  AND token = '7rulRLEtKVt9aeH0IKsvysGw28eOphpjJBjD3u/pmwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}